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To the Lighthouse

Blandford, Roger D. (2002) To the Lighthouse. In: Lighthouses of the Universe: The Most Luminous Celestial Objects and Their Use for Cosmology. ESO Astrophysics Symposia. Springer , Berlin, pp. 381-404. ISBN 978-3-540-43769-7.

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The extreme hypothesis that essentially all types of ultrarelativistic outflow - specifically AGN jets, pulsar wind nebulae and GRB - are electromagnetic, rather than gas dynamical, phenomena is considered. Electromagnetic flows are naturally anisotropic and self-collimating so as to produce jet-like features. The relativistic force-free description of these flows, which is simpler than the relativistic MHD description, is explained. It is suggested that the magnetic field associated with AGN jets and GRB is quite extensively distributed in latitüde, without necessarily increasing by much the total power. It is also proposed that the observed emission from these sources traces out regions of high current density where global instabilities drive a turbulence spectrum that is ultimately responsible for the particle acceleration and the synchrotron, inverse Compton and synchro-Compton emission. The direct extraction of spin energy from a black hole is re-examined and an electromagnetic model of GRB explosions is developed. It is also suggested that some GRB “lighthouses” be identified with accretion-induced collapse of a neutron star to form a black hole in a binary system.

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Blandford, Roger D.0000-0002-1854-5506
Additional Information:© 2002 Springer-Verlag Berlin Heidelberg. First Online 08 October 2003. I thank the organisers of this workshop for their hospitality and patience and Mitch Begelman, Paolo Coppi, Arieh Konigl, Amir Levinson, Max Lyutikov, Chris McKee, David Payne, Martin Rees and Roman Znajek for their collaboration. Brian Punsly and Maurice van Putten are also thanked for stimulating debates on some of the issues raised here. Support under NASA grant 5-2837 is gratefully acknowledged.
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Series Name:ESO Astrophysics Symposia
Record Number:CaltechAUTHORS:20190607-141641546
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96212
Deposited By: Tony Diaz
Deposited On:07 Jun 2019 21:51
Last Modified:16 Nov 2021 17:19

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